package com.example.ruiji.config;

import com.example.ruiji.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class MVCConfig extends WebMvcConfigurationSupport {
    /**
     * 设置静态资源映射
     *
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry){
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }


        //扩展mvc框架的消息转换器
        @Override
        protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
            //创建消息转换器对象
            MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
            //设置对象转换器，底层使用Jackson将Java对象转为json
            messageConverter.setObjectMapper(new JacksonObjectMapper());
            //将上面的消息转换器对象追加到mvc框架的转换器集合中,index为转换器在集合中的顺序，最先才能生效
            converters.add(0,messageConverter);
        }
    }
